I was on the order page, and quickly decided against purchasing when I saw the shipping charges. I'm sorry, but $3.50 (.25 BTC) for shipping is insane for something that fits inside an envelope. Take the .25 BTC shipping + .15 BTC Fee for the 1 BTC card, and it just fundamentally does not make sense unless you go up to the larger amounts like 20 BTC card. This is after slashing your fees in half?
Outside of that, it is a good idea, and one I would like to own. However, you are acting just like the ebay sellers and infomercial producers, who inflate shipping prices in hopes that people won't notice.
He's got a 3 month backorder... I doubt he's concerned about overpricing them at this point.
Besides, shipping always includes handling time and shipping materials, both of which cost time and money. If you just charge actual shipping, you will lose money on the shipping part of things. A company will ALWAYS inflate shipping beyond what it actually costs for the postage.